The M4 carbine family of firearms was derived from the M16, which was in turn derived from the AR-15. Simply put, the M4 is a shorter variant of the M16A2. The real steel has selective fire and three-round burst options, while the M4A1 model can fire fully automatic.

This training book has been developed from the ground up for beginners who know little about Airsoft AEG technology. As part of our Airsoft Technology Self-Paced Training Series, this book gives an introduction to the basic M4 AEG architecture. The primary goal of this book is to explain the various AEG technical concepts in very simple language.

We believe that this book and its support materials have everything you need for an informative, interesting, challenging and entertaining Airsoft educational experience.

As you read this book, if you have questions, send an e-mail to editor@airsoftpress.com; we will respond promptly. You are encouraged to visit our Web site, www.airsoftpress.com, regularly. We use the Web site to keep our readers and industry clients informed of the latest news on AirsoftPRESS publications and services. Please check the Web site occasionally for errata as well.